Clinical Epidemiology & Biostatistics
Stephen Walter
BSc, ARCS(London), PhD (Edinburgh)Professor, Department of Clinical Epidemiology & Biostatistics
Associate Member, Department of Mathematics and Statistics
905.525.9140 x 22338
905.577.0017
walter@mcmaster.ca
Faculty of Health Sciences
McMaster University
Health Sciences Centre, Room 2C20
1200 Main Street West
Hamilton, ON
L8N 3Z5
Administrative Assistant: Jennifer Ayres
905.525.9140 x 22338
905.577.0017
ayres@mcmaster.ca
Academic Interests
Dr. Walter collaborates with clinicians in internal medicine, evidence-based medicine, and developmental pediatrics, and with epidemiologists working in environmental health, cancer etiology and screening. He is interested in several areas of biostatistical methodology, including: design and analysis of research studies; risk assessment and communication; evaluation of diagnostic and screening data; and regional and temporal variation in health. He has published widely on these topics in the biomedical literature.
Dr. Walter has acted as an Editor of the American Journal of Epidemiology, and as a Section Editor for the Wiley Encyclopedia of Biostatistics. He has served as the Chair of Biostatistics in the International Clinical Epidemiology Network (INCLEN), and has been extensively involved with the development of clinical epidemiology in Asia, Latin America and Africa. He is a past coordinator of the Health Research Methods program, and has worked with approximately 100 students at the Masters and Ph.D. level.
Selected Publications
- Loeb M, Russell ML, Moss L, Fonseca K, Fox J, Earn DJD, Aoki F, Horsman G, Van Caeseele P, Chokani K, Vooght M, Babiuk L, Webby R, Walter SD (2010). Effect of influenza vaccination of children on infection rates in Hutterite communities: a randomized trial. JAMA 303, 943-50.
- Walter SD, Forbes A, Chan S, Macaskill P, Irwig L (2011). When should one adjust for measurement error in baseline variables in observational studies? Biometrical J 53, 28-39
- Walter SD. (2010) Local estimates of population attributable risk. J Clinical Epidemiology 63, 85-93.
- Walter SD, Sinclair JC. (2009) Uncertainty in the minimum event risk to justify treatment was evaluated. J Clinical Epidemiology, 62: 816-824.
- International Agency for Research on Cancer (2009): Vitamin D and Cancer. IARC Working Group Reports, 5.
- Pogue J, Walter SD, Yusuf S (2009). Evaluating the benefit of event adjudication of cardiovascular outcomes in large simple RCTs. Clinical Trials 6, 239-251.
- Briel M et al. (2009). Association between change in high-density lipoprotein cholesterol and cardiovascular disease morbidity and mortality: systematic review and meta-regression anaysis. BMJ 338, b92 (June 4).
- Walter SD, Ismaila AS, Devereaux PJ, for the SPRINT study investigators (2008). Statistical issues in the design and analysis of expertise-based randomized clinical trials. Statistics in Medicine 27: 6583-6596.
- Walter SD, Franco EL (2008). Use of latent class models to accommodate inter-laboratory variation in assessing genetic polymorphisms associated with disease risk. BMC Genetics, 9:51
- Walter SD, Gafni A, Birch S (2008). A geometric confidence ellipse approach to the estimation of the ratio of two variables. Statistics in Medicine 27, 5956-5974.